Stool seat



FIG. 1 is a top perspective view of a stool seat;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof, a rear elevational view not being shown as it is a mirror image of the front elevational view;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a bottom perspective view. 

CLAIM The ornamental design for a stool seat, as shown and described. 